If a person who has never been infected with or vaccinated against the varicella-zoster virus comes in contact with a person who has shingles, they can come down with:

A Y shaped protein produced in response to an antigen that is capable of binding specifically to the antigen.

A bacterium that cause Meningitis, Neisseria meningitidis, initially colonizes the _______. 

A person should engage in aerobic exercise 

If pain is experienced while exercising 

Prior to a sporting event, athletes may choose this dietary meal plan.

Which one is not a method to select the optimal number of clusters in K-means?

Which one is not true for the Principal Component Analysis (PCA)?

Based on the above plot for the PCA, The (1)___________(a. PC1, b. PC2) captures the largest variance in the sample data. The (2)___________(a. PC1, b. PC2) captures the second largest variance in the sample data. The direction of PC2 is orthogonal to PC1. PC1 and PC2 are (3)___________(a. correlated, b. uncorrelated).

Which one is not a key hyperparameter for deep neural networks?