Final answer:
The Portuguese, Spanish, and Dutch were the three European groups that conquered Malacca.
Step-by-step explanation:
The three European groups that conquered Malacca were the Portuguese, Spanish, and Dutch.
The Portuguese first attacked Malacca in 1511 and took control of the city, but they were later expelled due to their attempts to convert the local population to Christianity. The Spanish took control of the Philippines, while the Dutch became the main European power in Indonesia.