Can someone me with this sentence?

i have to identify the italicized clause.

*where we shall go* is a secret.

is it:
adjective clause
adverb clause
noun clause
gerund phrase

It is used as a noun clause here. Noun clauses function the same way simple nouns do - they answer questions such as who or what.
So, what is a secret? Where we shall go - it functions as an object.

An inference that can be made is that the princess is bothered about the tiger door. although there are reasons for both this one has a better reason. the princess is not a monster and even if she didn't want to marry this man she wouldn't want him to die. the grudge of death is pretty heavy. unless she has done this before and feels no regret then she wouldn't want to be married to someone of low quality, if he is low quality.

The question is b i think