Answer #1

go to wp-content ->plugin->make a folder rahul

add_action( 'admin_menu', 'my_first_menu' );

function my_first_menu(){

add_menu_page( 'Browser Title', 'Menu Title', 'manage_options', 'rahul/myplugin-admin.php', '', plugins_url( 'rahul/images/logo.png' ), 6 );

}

Answer #2

Go to wp_content->plugin->folder name(rhaul)

and create a file name myplugin-admin.php (you can choose any name)

add_action( 'admin_menu', 'my_first_menu' );

function my_first_menu(){

add_menu_page( 'Browser Title', 'Menu Title', 'manage_options', 'rahul/myplugin-admin.php', '', plugins_url( 'rahul/images/logo.png' ), 6 );

}