if powerful is replaced with power, it also corrects the sentence
In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select ‘No Error’.
You may not know it but this engine is 1)/ claimed to have twice 2)/ as powerful as the previous one. 3)/ No error 4)
Replace ‘have’ with ‘be’.