The second and third letters, fourth and fifth letters, sixth and seventh letters of the word mutually interchange positions to form the code.

Correct Option: B

For question it is clear that, the second and third letters, fourth and fifth letters, sixth and seventh letters of the word mutually interchange positions to form the code.

So
C ⇒ C

I ⇘ R

R ⇗ I

C ⇘ U

U ⇗ C

L ⇘ A

A ⇗ L

R ⇒ R

so the code for CIRCULAR is CRIUCALR

F L A T T E R
7 2 3 8 8 5 9
and
M O T H E R
4 6 8 1 5 9
therefore,
M A M M O T H
4 3 4 4 6 8 1

Correct Option: A

F L A T T E R
7 2 3 8 8 5 9
and
M O T H E R
4 6 8 1 5 9
therefore,
M A M M O T H
4 3 4 4 6 8 1

GRAPE = 2 7 3 5 4
FOUR = 1 6 8 7
So, G = 2, R = 7, A = 3, P = 5, E = 4,
F = 1, O = 6, U = 8,
R = 7
GROUP = 2 7 6 8 5

Correct Option: C

GRAPE = 2 7 3 5 4
FOUR = 1 6 8 7
So, G = 2, R = 7, A = 3, P = 5, E = 4,
F = 1, O = 6, U = 8,
R = 7
GROUP = 2 7 6 8 5

The given logic is as follows,
Sum of the digits + second digit = Answer.
i.e., 1 +4 = 5 + 4 = 9
2 + 8 = 10 + 8 = 18
Similarly, 7 + 8 = 15 + 8 = 23.

Correct Option: B

The given logic is as follows,
Sum of the digits + second digit = Answer.
i.e., 1 +4 = 5 + 4 = 9
2 + 8 = 10 + 8 = 18
Similarly, 7 + 8 = 15 + 8 = 23.

Given, coded word :
Z B Y X M N Q B
S T R A I G H T

Correct Option: C

Given, coded word :
Z B Y X M N Q B
S T R A I G H T