First, there is a misspelled word in your question. There is no such word as "spelt".
As for your question, which do you think it is? If you don't know, look up the words:
http://www.mirriam-webster.com
Which word in the following sentence is spelt incorrectly?
“The ambidectrous student was conspicuously popular on the baseball team because he could pitch with either his right or left hand.” [L.11-12.2.b]
A. pitch
B. popular
C. conspicuously
D. ambidectrous
2 answers
I'm sorry. "spelt" is a word, the past tense of "spell", and you used it correctly. "Spelled" is a better usage, though.