What is the output of the below code snippet? int a = 7, b = & C= 4: if(a=b) printf("%d. (a+b)); else printf("%d",(b-c)): O a. 5 O b.4 O c. 15 d. -1 What is the output of the below code snippet? char greeting[6] = {'H', 'e', 'T, T, 'o', '\0'); printf("%c" greeting (21): a