In a code language, 'PALM' is coded as 16-1-12-13 and 'HEAD' is coded as 8-5-1-4. How will 'NECK' be coded in the same language?

The coding matches each letter directly to its positional rank in the standard English alphabet (A=1,B=2,…,Z=26).
'PALM': P=16, A=1, L=12, M=13⟹16-1-12-13

'HEAD': H=8, E=5, A=1, D=4⟹8-5-1-4

Applying the same rule to 'NECK':

N=14

E=5

C=3

K=11

Hence, the code is 14-5-3-11.