Final answer:
The statement regarding Jassa Singh occupying Kapurthala, assuming the title of king, and issuing coins in 1778 is True. He was a key leader in the Sikh Empire and corroborated his status as a ruler by issuing coins.
Step-by-step explanation:
The statement "In 1778, Jassa Singh occupied Kapurthala and assumed the title of king. He also issued coins." is True. Jassa Singh Ahluwalia was a prominent figure in the history of the Sikh confederacy and the rise of the Sikh Empire. After consolidating the Sikh misls (loose confederacies), he became the leader of the Kapurthala missal. He indeed occupied Kapurthala and later assumed the title of 'Sultan-ul-Quam' (the king of the nation) in 1778. Singh was recognized by the Sikh community and his peers for his leadership, and he did issue coins that bore his name, solidifying his authority and status as a ruler.