Which letter replaces the question mark ?

Question

Answer 1

Q

6+4+4=14 and N is 14th alphabet

5+6+10=21 and U is 21st alphabet

4+1+7=12 and L is 12th alphabet

Thus,

1+2+14=17 and Q is 17th alphabet

Answer 2

14+2+1= 17 in alphabet 17 is Q.