<span>What is selective mutism?
Selective
mutism is a complex childhood disorder characterized by a child's
inability to speak and communicate effectively in selected social
contexts, such as school. <span>These children are able to speak and communicate in environments where they are comfortable, safe and relaxed.</span></span>
Explanation:
lagrange equation is important for solving optimization problems in which given some functional,one seems the function minimizing or maximising it.
B would be the correct answer