Hint:Look at the steps to form the compound consonant ज्ञ.
Write ज, then add the halant (्) to suppress its inherent vowel, then write ञ
Write ज and ञ separately without any halant
Write ज first, then add the halant (्) to suppress its inherent vowel, then write an independent vowel
Write an independent vowel first, then add ज and ञ with a halant
Explanation
According to the topic description, ज्ञ is formed by writing ज first, then adding the halant (्) to suppress its inherent vowel, and finally writing ञ.