Statements:
R © F, F # D, D @ M
Conclusions:
I. R © D II. M % F III. M S R

Correct Answer: if only conclusion II is true

Explanation:

N < O ? R > T; R < A; B ? T
Check for I:
N < O ? R > T
? No definite relation can be found between N and A.
Check for II:

Correct Answer: if neither conclusion I nor II is true

Explanation:

C ? D = E ? F, Y < D ? W
Check for I:
C ? D > Y
It means C > Y. Thus, I does stand true. check for II:
Y < D ? F
It means F > Y. Thus, II also does not stand true.

Correct Answer:

Explanation:

S ? T < U ? W; T ? R, G > U
Check for I:
S ? T ? R
? R ? S follows
Check for II:
G > U ? W
? W < G follows
Hence, both I and II follows

Correct Answer:

Explanation:

H ? G < I; F ? G > Z
Check for I:
F ? G ? H is definitely follows
Check for II:
Z < G < I
? Z < I also follows
Hence, both I and II follows

Correct Answer: if only conclusion I is true

Explanation:

H ? T ...(i) T < L ...(ii) L = F ...(iii)
Combining these we get H ? T < L = F.
Hence F > H and I follows.
But H < L and Hence II (H ? L ) does not follow.

Correct Answer: Only either I or II and III are true

Explanation:

M ? W ...(i) W = N ...(ii) N > B ...(iii)
Combining these we get M ? W = N > B.
Hence M ? N or N ? M,
Which means either I (N = M) or II (N < M) follows.
Also M > B and II (M ? D) Hence III definitely true.

Correct Answer: Only either I or II and III are true

Explanation:

M ? W ...(i) W = N ...(ii) N > B ...(iii)
Combining these we get M ? W = N > B.
Hence M ? N or N ? M,
Which means either I (N = M) or II (N < M) follows.
Also M > B and II (M ? D) Hence III deficitely true.

Correct Answer: None is true

Explanation:

W ? F ...(i) F > M ...(ii) M < D ...(iii)
From (i) and (ii) W and M can't be compared. Hence II does not follow.
From (ii) and (iii) F and D can't be compared. Hence neither I or III follows.

Correct Answer: Only III is true

Explanation:

B = H ...(i) H > E ...(ii) E ? K ...(iii)
From (i) and (ii) B = H > E or E < B
Hence III follows.
From (ii) and (iii) H and K can't be compared.
Hence I does not follow. Nor can II follow.

Correct Answer: Only II is true

Explanation:

F ? N ...(i) N < D ...(ii) D ? R ...(iii)
From (i) and (ii) F and can't be compared.
Hence I does not follow.
From (ii) and (iii) N < D ? R or R > N ...(iv)
Hence II follows. From (i) and (iv) R and F can't be compared. Hence III does not follow.