There are no colleges in kolkata which are offering Bachelor of Science nursing to the male candidates only. However I am mentioning blow the name of all the colleges of Kolkata which are offering Bachelor of Science nursing to the students:

1. College of Nursing Kolkata
2. Government College of Nursing Kolkata
3. RGkAR medical College hospital
4. Aliah university department of nursing
5. Asansol esi hospital college of nursing

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https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/colleges/list-of-bsc-in-nursing-science-degree-colleges-in-west-bengal&ved=2ahUKEwiB2Jf4pYv5AhXa3jgGHcLJDWAQFnoECE8QAQ&usg=AOvVaw2IRuC7tvSLwBwTUQZTnpJa