PAST

The possible representations of each alphabet:
A ? 00, 12, 23, 34, 41
R ? 01, 13, 24, 30, 42
S ? 02, 14, 20, 31, 43
N ? 03, 10, 21, 32, 44
C ? 04, 11, 22, 33, 40
O ? 55, 66, 77, 88, 99
E ? 56, 67, 78, 89, 95
L ? 57, 68, 79, 85, 96
P ? 58, 69, 75, 86, 97
T ? 59, 65, 76, 87, 98
From given matrix it is clear that all the values for word PAST are matched in only option ( 2 ) for every letter . So , the set for the word PAST will be 86, 12, 31, 76 .From matrix , option ( 2 ) is required answer.