Rajya Sabha proceedings were adjourned in the pre-lunch session on Thursday as the ruling BJP and opposition parties engaged in a verbal duel over Congress leader Rahul Gandhi's 'democracy in danger' remark in London and a demand for a probe into allegations against the Adani Group. MPs from both sides shouted slogans in support of their demands, prompting Chairman Jagdeep Dhankhar to adjourn the proceedings till 2 pm.