Step 1: Understanding the Question:
This question pertains to the pedagogical best practices for early childhood care and education (ECCE) regarding language.
Step 2: Detailed Explanation:
• Preschool children (ages 3-6) are in a critical stage of language acquisition and cognitive mapping.
• Experts in child development and national policies (like the National Education Policy 2020) emphasize that the mother tongue (B) is the ideal medium of instruction.
• Learning in the language spoken at home reduces the cognitive load on the child, allowing them to grasp concepts more easily without the barrier of an unfamiliar language.
• It fosters a positive self-image and ensures a smooth transition from home to school.
• While regional languages (A) are often the same as the mother tongue, the term "Mother Tongue" is more precise as it accounts for various dialects and home languages.
Step 3: Final Answer:
Mother tongue is the ideal medium of instruction for preschool education.