51. Which river did Alexander cross to enter India?
A) Indus
B) Ganges
C) Brahmaputra
D) Beas
Answer: A) Indus
52. Which region of India did Alexander first conquer?
A) Punjab
B) Gujarat
C) Bihar
D) Tamil Nadu
Answer: A) Punjab
53. What was the name of the Indian king who fought against Alexander at the Battle of Hydaspes?
A) Porus
B) Nanda
C) Chandragupta Maurya
D) Ashoka
Answer: A) Porus
54. What was the name of the Indian king who surrendered to Alexander without a fight?
A) Nanda
B) Porus
C) Chandragupta Maurya
D) Ashoka
Answer: B) Porus
55. What was the name of the Indian king who allied with Alexander and helped him in his conquest of India?
A) Nanda
B) Porus
C) Chandragupta Maurya
D) Taxiles
Answer: D) Taxiles