Introduction:
After the bifurcation of Jammu and Kashmir, the number of states in India changed. Let's explore the details and understand the correct answer.

Explanation:
The bifurcation of Jammu and Kashmir led to the reorganization of the state into two separate Union Territories - Jammu and Kashmir, and Ladakh. Prior to the bifurcation, Jammu and Kashmir was a state within the Indian Union.

Reorganization of Jammu and Kashmir:
On August 5, 2019, the Government of India abrogated Article 370 of the Indian Constitution, which granted a special autonomous status to Jammu and Kashmir. Along with the revocation of Article 370, the government also decided to reorganize the state.

Creation of Union Territories:
As a result of the reorganization, Jammu and Kashmir was converted into a Union Territory with a legislature, and Ladakh became a separate Union Territory without a legislature. The Union Territory of Jammu and Kashmir consists of the regions of Jammu, Kashmir Valley, and Ladakh.

Number of States in India:
Before the bifurcation, India had 29 states. With the creation of the Union Territories of Jammu and Kashmir and Ladakh, the number of states in India remained the same, i.e., 29. Therefore, the correct answer is option 'B' - 28 states.

Conclusion:
After the bifurcation of Jammu and Kashmir, the number of states in India remained unchanged at 28. Jammu and Kashmir was converted into a Union Territory with a legislature and Ladakh became a separate Union Territory without a legislature. This reorganization aimed at bringing administrative and developmental changes in the region.