Who was sworn in as the first Chief Minister of the state of Telangana after its formation as the twenty ninth state of India?

Introduction / Context:
This question is about contemporary Indian political history and focuses on the creation of the state of Telangana. When a new state is formed, the identity of its first Chief Minister becomes an important factual point for exams. Telangana was created as the twenty ninth state of India, and students are expected to remember who led its first government.

Given Data / Assumptions:

• The state in question is Telangana.
• It was formed as the twenty ninth state of India.
• The options list prominent political leaders associated with Andhra Pradesh and Telangana politics.

Concept / Approach:
Telangana was formed on 2 June 2014 after a long political and social movement. K. Chandrashekar Rao, also known as KCR, led the Telangana movement and his party, the Telangana Rashtra Samithi, won the assembly elections held around the time of state formation. He was sworn in as the first Chief Minister of Telangana. Other leaders in the options played different roles but were not the first Chief Minister of Telangana.

Step-by-Step Solution:
Step 1: Recall that Telangana became a separate state in 2014. Step 2: Remember that the Telangana Rashtra Samithi, led by K. Chandrashekar Rao, formed the first government. Step 3: Identify K. Chandrashekar Rao among the options as the leader associated with the Telangana statehood movement and its first government. Step 4: Note that R. Krishnaiah and K. Jana Reddy are other political figures, while N. Chandrababu Naidu became Chief Minister of the residuary state of Andhra Pradesh after bifurcation. Step 5: Select K. Chandrashekar Rao as the correct answer.

Verification / Alternative check:
Another way to verify is to recall news coverage from 2014, which repeatedly showed K. Chandrashekar Rao taking oath as the first Chief Minister of the new state in Hyderabad. Chandrababu Naidu, in contrast, took oath as Chief Minister of Andhra Pradesh, not Telangana.

Why Other Options Are Wrong:
Option A (R. Krishnaiah) is a political leader and activist but was not the first Chief Minister of Telangana.
Option C (K. Jana Reddy) is a senior Congress leader from the region, but he did not become the first Chief Minister of the new state.
Option D (N. Chandrababu Naidu) did become Chief Minister in 2014, but of the reorganised Andhra Pradesh, not of Telangana.

Common Pitfalls:
Students may confuse the leadership of Telangana and Andhra Pradesh immediately after bifurcation, especially because both states held elections around the same time. Remembering that K. Chandrashekar Rao led the Telangana movement and became the first Chief Minister of Telangana helps avoid this confusion.

Final Answer:
The first Chief Minister of the state of Telangana was K. Chandrashekar Rao.