Explanation:

- The Pashu-Kisan Credit Card Scheme was launched by the state government to support farmers by providing financial assistance for livestock and agriculture.

- The scheme is aimed at boosting the agricultural sector and improving the livelihoods of farmers.

- Let's go through the options to identify which state launched this scheme:

1. Gujarat: Known for various agricultural schemes but not specifically for the Pashu-Kisan Credit Card Scheme.

2. Haryana: The correct answer. Haryana started the Pashu-Kisan Credit Card Scheme in 2020.

3. Punjab: Focuses on agricultural advancements, but this particular scheme was not launched by Punjab.

4. Rajasthan: Has its own set of agricultural support schemes, but did not launch the Pashu-Kisan Credit Card Scheme in 2020.