Step 1: About Banihal Tunnel.
The Banihal Tunnel, also known as Jawahar Tunnel, connects Jammu with the Kashmir Valley. It is an important engineering project in India.
Step 2: Year of construction.
The tunnel was constructed in 1959 to ensure all-weather connectivity between Jammu and Srinagar.
Step 3: Analysis of options.
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(A) 1959: Correct. Construction was completed in this year.
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(B) 1960: Incorrect.
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(C) 1961: Incorrect.
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(D) 1962: Incorrect.
Step 4: Conclusion.
Hence, the Banihal Tunnel was constructed in 1959.
Final Answer:} 1959.