Correct Answer: C

Rationale: Rationale for Correct Answer (C): A trial of scar is indicated when a woman has had no more than two previous caesarean sections. This is because the risk of uterine rupture increases with each subsequent caesarean section due to scar tissue weakening. Limiting the number of previous scars reduces this risk. Therefore, option C is correct. Summary of Incorrect Choices: A: Estimated fetal weight is not a determining factor for a trial of scar. B: Availability of a level one hospital nearby is important for emergency situations but not a criteria for trial of scar. D: Adequate pelvis with true conjugate 10.5cm is important for vaginal delivery but not a specific requirement for a trial of scar.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): A trial of scar is indicated when a woman has had no more than two previous caesarean sections. This is because the risk of uterine rupture increases with each subsequent caesarean section due to scar tissue weakening. Limiting the number of previous scars reduces this risk. Therefore, option C is correct. Summary of Incorrect Choices: A: Estimated fetal weight is not a determining factor for a trial of scar. B: Availability of a level one hospital nearby is important for emergency situations but not a criteria for trial of scar. D: Adequate pelvis with true conjugate 10.5cm is important for vaginal delivery but not a specific requirement for a trial of scar.

Correct Answer: B

Rationale: The correct answer is B: Rotational injury. Flexion-distraction injuries of the thoracolumbar spine are often caused by rotational forces that occur during accidents such as motor vehicle collisions or falls. These forces lead to the spine being twisted, causing separation of the vertebrae. Blunt trauma (A) can cause various spinal injuries but is not specific to flexion-distraction injuries. Seat belts (C) are designed to prevent spinal injuries by restraining the body during a collision. Gunshot wounds (D) can cause spinal cord injuries but are not commonly associated with flexion-distraction injuries of the thoracolumbar spine.

Correct Answer: B

Rationale: Congenital retraction of the prepuce, leading to permanent glans exposure, describes paraphimosis. This condition occurs when the foreskin is pulled back and cannot return to its normal position, causing pain and swelling. Phimosis (A) is the inability to retract the foreskin over the glans. Hypospadias (C) is a urethral opening on the underside of the penis. Hermaphroditism (D) is a rare condition of having both male and female reproductive organs. Paraphimosis (B) is the specific term for the given scenario.

Correct Answer: B

Rationale: Step 1: Feminizing adrenal tumors are not always carcinomas, so A is incorrect. Step 2: Virilizing tumors in women can originate from adrenal or extra-adrenal sites, so C is incorrect. Step 3: Virilizing adrenal tumors are usually benign, especially in children, so D is incorrect. Step 4: B is correct as feminizing adrenal tumors are rare but are the most common type of adrenal tumor causing gender symptoms.