Find out whether there is any grammatical error in below sentence. At present juncture / however, the supercomputer / would be a costly toy.

The correct answer is: D. No error

The sentence is grammatically correct. The word “however” is used to introduce a contrast or qualification. In this case, it is used to contrast the present situation with a possible future situation. The

word “supercomputer” is a noun that refers to a very powerful computer. The word “would be” is a modal verb that is used to express possibility or probability. The word “a costly toy” is a noun phrase that refers to something that is expensive but not very useful.

The sentence is well-structured and easy to understand. The words are used correctly and in the right order. The sentence does not contain any errors in grammar, spelling, or punctuation.