The compact layout allows you to control the highlight panel on Salesforce classic like Salesforce lightning.

Answer options:

A.True
B.False

Correct Answer: B 
The compact layout works only in the lightning experience and it allows you to add fields highlighted at a glance. The highlight panel section that exists in the page layout editor, controls the highlights panel in Salesforce classic only and it doesn’t have any use in lightning. 
References: 

https://help.salesforce.com/articleView?id=customize_layoutcustomize_highlights_panel_config.htm&type=5

Correct Answer: B 
The compact layout works only in the lightning experience and it allows you to add fields highlighted at a glance. The highlight panel section that exists in the page layout editor, controls the highlights panel in Salesforce classic only and it doesn’t have any use in lightning. 
References: 

https://help.salesforce.com/articleView?id=compact_layout_overview.htm&type=5