Step 1: The size of a Navy can be measured by the total number of battle force ships and naval personnel.
Step 2: In recent years, China has built the largest Navy in the world in terms of ship numbers, surpassing the United States.
Step 3: China’s rapid naval expansion includes aircraft carriers, destroyers, frigates, submarines, and other vessels, aimed at strengthening its maritime influence.
Step 4: While the USA still has more advanced and powerful warships in terms of capability, China leads in numerical strength.
Step 5: Other options:
- India has a growing but smaller Navy compared to China.
- The USA is second in total number of ships but leads in technology and global reach.
- Russia has a strong Navy but smaller in active ship numbers compared to China.
Thus, the country with the largest Navy in terms of number of ships is $\mathbfChina$.