Option (d) is correct.

If the statement "no animals are fishes" is given as false, it means that there are animals that are fishes.

A. "All fishes are animals."

This statement cannot be immediately inferred to be true based on the given information. The fact that there are animals that are fishes does not necessarily imply that all fishes are animals.

B. "Some animals are not fishes."

This statement can be immediately inferred to be true. Since the statement "no animals are fishes" is false, it implies that there exist animals that are not fishes.

C. "All animals are fishes."

This statement cannot be immediately inferred to be true based on the given information. The fact that there exist animals that are fishes does not imply that all animals are fishes.

D. "Some animals are fishes."

This statement can be immediately inferred to be true. Since the statement "no animals are fishes" is false, it means that there are animals that are fishes.

Therefore, the correct answer is (d) D Only.

विकल्प (d) सही है।

"कोई भी पशु मछली नहीं है” को गलत रुप में दिया है, यह “E” प्रकार का कथन है, अतः इसके साथ (I) का प्रकार का वाक्य (कुछ पशु मछलियाँ है) सत्य होगा क्योंकि वे एक दूसरे से व्याधाती संबंध रखते है, अर्थात एक गलत है तो दूसरा सही होगा।