An enzyme of the gastric juice of infants that helps in the digestion of milk proteins isa. Rennin b. Amylase c. Lipase d. Nuclease

Sure, here are some sample step-by-step solutions for a math problem: Problem: Solve for x: 2x + 5 = 13 Solution: Step 1: Subtract 5 from both sides of the equation to isolate the variable. $\begin{array}{rl}2x+5-5& =13-5\\ 2x& =8\end{array}$ Step 2: Divide both sides of the equation by 2 to solve for x. $\begin{array}{rl}\frac{2x}{2}& =\frac{8}{2}\\ x& =4\end{array}$ Therefore, the solution to the equation 2x + 5 = 13 is x = 4. Note: It's important to show all steps and explain why each step is necessary to help students understand the problem-solving process.