###Rationale: Fetal fissure is closed by 6th week Failure to close can lead to formation of coloboma(eg- pear shaped coloboma of iris,chorioretinal coloboma i)

###Answer: OPTION C IS CORRECT.
###Question: Fetal /choroidal fissure is closed by which week of gestation
###Options:
A. 3rd week
B. 4th week
C. 6th week
D. 8th week
