Select the option that represents the correct word split / combination (Sandhi-Vicched) for:
"धर्मात्मा" (Dharmatma)

The word 'धर्मात्मा' is formed through Dirgha Swar Sandhi:
$$\text{धर्म (dharm)}+\text{आत्मा (atma)}=\text{धर्मात्मा (Dharmatma)}$$

Here, the final short vowel sound $a$ of the first word merges with the initial long vowel $a$ of the second word to form the long vowel $\bar{a}$ ($a+\bar{a}=\bar{a}$).