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.