For an electron in 3p-orbital, the values of n=3 l=0,‌‌1,‌‌2(∵ value of l are form 0 to n−1) ∴m=0‌‌−1,0,+1,−2,−1,0,+1,+2 (∵ For each value of l, the value of n varies from −l to 0 , to +l). Also, for every value of m, the values of s can be +1∕2 and −1∕2. ∴ Option (b) is incorrect, as for n=3, the value of m cannot be −2.