Hyper keratosis is due to
(a) Hypervitaminosis of vitamin A
(b) Hypervitaminosis of vitamin C
(c) Hypervitaminosis of vitamin K
(d) Hypervitaminosis of vitamin B12
(a) Hypervitaminosis of vitamin A
(b) Hypervitaminosis of vitamin C
(c) Hypervitaminosis of vitamin K
(d) Hypervitaminosis of vitamin B12