Step 1: Understanding Assertion (A).
Jainism, like Buddhism, spread widely across different regions of India. It gained followers in various parts such as Gujarat, Rajasthan, Karnataka, and Tamil Nadu. Hence, the assertion is correct.
Step 2: Understanding Reason (R).
Jaina scholars contributed significantly to literature in multiple regional and classical languages such as Prakrit, Sanskrit, and Tamil. This made Jain teachings accessible to a wider population across different regions. Hence, the reason is also correct.
Step 3: Linking Assertion and Reason.
The spread of Jainism was greatly supported by the availability of religious texts and teachings in different languages. This helped in reaching people of diverse linguistic backgrounds, thereby facilitating its expansion across India.
Step 4: Conclusion.
Thus, both Assertion and Reason are correct, and the Reason correctly explains the Assertion.
Final Answer: Both (A) and (R) are correct and (R) is the correct explanation of (A).
Two statements are given below as Assertion and Reason (R). Read them carefully and choose the correct option.
Assertion : Harappa was a well-planned city.
Reason (R): It had a well-planned drainage system.
Match Column-I with Column-II and choose the correct option: 
Identify the ancient Indian text with the help of the following information: