The correct answer is option 1, Her Holiness Mataji Maharani Tapaswini, who was the founder of Mahakali Pathshala in Calcutta.

Option 2, Sister Nivedita, was not the founder of Mahakali Pathshala. It is important to note that Sister Nivedita, whose birth name was Margaret Elizabeth Noble, was a disciple of Swami Vivekananda and played a significant role in promoting education and women`s empowerment in India. However, she was not directly involved with the founding of Mahakali Pathshala.

Option 3, Madame Blavatsky, was a prominent Russian occultist, author, and co-founder of the Theosophical Society. While she did have connections to Calcutta and played a role in the Theosophical movement in India, she was not the founder of Mahakali Pathshala.

Option 4, Sarojini Naidu, was a renowned Indian poet and political activist. Although she had a significant impact on the Indian independence movement and held various positions in the Indian National Congress, she was not involved in the founding of Mahakali Pathshala.

In conclusion, the correct answer is option 1, Her Holiness Mataji Maharani