The fetal kidneys start producing urine at:

Correct option is C

Ans. (c) 12 weeks
Sol. Fetal kidneys begin to produce urine by the 12th week of gestation, contributing significantly to amniotic fluid volume in the second trimester.
Explanation of each option:
· (a) 8 weeks – Nephron development begins but urine production hasn't started yet.
· (b) 10 weeks – Kidney development is ongoing but not functional.
· (c) 12 weeks – Correct. Kidneys begin urine formation.
· (d) 14 weeks – Production is well established by this time.