The vitamin that is essential for the proper development of the fetal nervous system is: MCQ with Answer and Explanation

Explanation:
Rickets is characterized by defective mineralization of bones, leading to bowed legs, soft skull, and skeletal deformities due to vitamin D deficiency in children. In adults, deficiency causes osteomalacia. Scurvy is vitamin C deficiency, pellagra is niacin deficiency, beri-beri is thiamine deficiency. Vitamin D (calciferol) promotes calcium and phosphorus absorption from the gut. Sunlight exposure helps synthesize vitamin D in skin.

Explanation:
A stroke (cerebrovascular accident) occurs when blood supply to part of the brain is interrupted, causing tissue death. Myocardial infarction is heart attack, aneurysm is vessel ballooning, embolism is blockage by a traveling clot.

Explanation:
The fovea contains tightly packed cones with photopsins (iodopsins) sensitive to red, green, blue. Rhodopsin is in rods for dim light.