The symbolic representation of four logic gates are given below:
(i)
(ii)
(iii)
(iv)
The logic symbols for OR, NOT and NAND gates are respectively:
(iv), (i), (iii)
(iv), (ii), (i)
(i), (iii), (iv)
(iii), (iv), (ii)
NOT Gate -
OR Gate-
NAND Gate-
so correct answer is option B