Who was the first Indian swimmer to cross seven important seas of the world by long distance swimming?

Introduction / Context:
India has produced several remarkable long distance swimmers who have conquered challenging sea channels around the world. Among them, one Indian woman gained special recognition for crossing seven important seas, a feat that required exceptional endurance, training and mental strength. This question tests your knowledge of Indian sports personalities beyond the more commonly known fields such as cricket and athletics.

Given Data / Assumptions:
• The achievement is crossing seven important seas of the world by swimming.
• The person is an Indian swimmer known specifically for this multi sea achievement.
• Names from different backgrounds, including non swimmers, are offered as options.
• We need to identify the correct Indian woman swimmer associated with this record.

Concept / Approach:
Bula Chaudhury, an Indian long distance swimmer from West Bengal, is widely recognised for her achievements in open water swimming. She became the first woman in the world to swim across seven important seas, which included significant channels in different parts of the world. This made her a pioneer and a symbol of endurance in Indian swimming. None of the other names in the options match this specific feat.

Step-by-Step Solution:
Step 1: Recall the name of the Indian swimmer known for successfully crossing seven major seas by long distance swimming. Step 2: Identify that swimmer as Bula Chaudhury, who accomplished this unique record. Step 3: Check the listed options and locate Bula Chaudhury among them. Step 4: Confirm that the other names do not correspond to Indian long distance sea swimmers with this record. Step 5: Choose Bula Chaudhury as the correct answer.

Verification / Alternative check:
If you are familiar with Indian sports awards, you may recall that Bula Chaudhury has received national recognition for her open water swimming achievements. News and sports references frequently mention her crossing of the English Channel and other important sea channels. Together these feats are summarised as swimming across seven seas. None of the other options, such as Junko Tabei, who was a Japanese mountaineer, or Yuri Gagarin, the Soviet cosmonaut, are associated with marathon swimming events. This clear mismatch confirms that Bula Chaudhury is the right choice.

Why Other Options Are Wrong:
Amrendra Singh: This name does not correspond to an internationally recognised Indian long distance sea swimmer with this record.
Junko Tabei: A famous Japanese mountaineer, the first woman to climb Mount Everest, not an Indian swimmer.
Yuri Gagarin: The first human to journey into outer space, associated with space travel, not sea swimming.
Mihir Sen: An Indian long distance swimmer known for several channel crossings, but the specific record of seven seas in this context is associated with Bula Chaudhury as a pioneering woman swimmer.

Common Pitfalls:
Because Mihir Sen is also a legendary Indian long distance swimmer, some students confuse his achievements with those of Bula Chaudhury and pick his name by mistake. It is important to note that this question focuses on the first Indian woman to cross seven important seas, which clearly refers to Bula Chaudhury. Paying attention to both gender and the exact phrasing of the record will help you avoid such confusion in sports general knowledge questions.

Final Answer:
The first Indian swimmer to cross seven important seas of the world by long distance swimming was Bula Chaudhury.