The pair that is not correctly matched is Option 4: Bal Gangadhar Tilak - Satya Shodhak Sabha.

1. Jamnalal Bajaj - Satyagraha Ashram at Wardha:

This pair is correctly matched. Jamnalal Bajaj was a close associate of Mahatma Gandhi and a prominent freedom fighter. He established the Satyagraha Ashram at Wardha, Maharashtra, in 1921. The ashram was a center for Gandhian activities and played a crucial role in the Indian independence movement.

2. Dadabhai Naoroji - Bombay Association:

This pair is correctly matched. Dadabhai Naoroji was a prominent Indian political leader and one of the early leaders of the Indian National Congress. He founded the Bombay Association in 1852, which was one of the earliest political organizations in India. The association aimed to promote education and social reforms, and it played a significant role in advocating for Indian political rights.

3. Lala Lajpat Rai - National School at Lahore:

This pair is correctly matched. Lala Lajpat Rai, also known as Punjab Kesari (Lion of Punjab), was a prominent Indian freedom fighter and a leader of the Indian National Congress. He established the National School in Lahore in 1893, which became an important center for nationalist education and played a crucial role in shaping the minds of young revolutionaries.

4. Bal Gangadhar Tilak - Satya Shodhak Sabha:

This pair is not correctly matched. Satya Shodhak Sabha (The Society for the Search for Truth) was founded by Jyotirao Phule in 1873. It was a social reform organization in Maharashtra that fought against caste discrimination and worked for the upliftment of the lower castes. Bal Gangadhar Tilak, on the other hand, was a prominent leader in the Indian independence movement, known for his nationalist ideas and for popularizing the concept of Swaraj (self-rule). He was not associated with the Satya Shodhak Sabha.

In conclusion, the pair that is not correctly matched is Option 4: Bal Gangadhar Tilak - Satya Shodhak Sabha.