Problems in telegram bot commands

Question

I'm creating a bot that sends math problems in image format. I wanted to create two two functions for different commands, so that one command only sends one genre of question, while the other sends another genre. Example: /random sends general problems, while /comb sends combinatorial problems.

My attempt:

@dp.message_handler(commands=['random', 'comb'])
async def random_cat(message: types.Message):
    captions = ["Nice problem!", "Niceeeeee :eyes:",
                "Noice", "Very cool"]
    caption = random.choice(captions)
    asyncio.create_task(fetch_cat())
    if dp.message_handler(commands=['random']):
        for image in [random.choice(["quest1.jpg", "quest2.jpg", "quest4.jpg", "quest5.jpg", "quest6.jpg",
                                    "quest7.jpg", "quest8.jpg","quest9.jpg", "quest10.jpg", "quest11.jpg", "quest12.jpg"])]:
            f = open(image, 'rb')
            photo = f.read()
            f.close()        
    elif dp.message_handler(commands=['comb']):
        for item in [random.choice(["quest14.jpg", "quest15.jpg"])]:
            r = open(item, 'rb')
            photo = r.read()
            r.close()             
    # _id = random.random()
    await bot.send_photo(chat_id=message.chat.id,
                         photo=photo,
                         caption=emojize(
                             caption) if caption == captions[1] else caption,
                         reply_to_message_id=message.message_id)
if __name__ == '__main__':
    executor.start_polling(dp, skip_updates=True)

Even with the code, the bot sends the same messages for the same command. How to solve this? If possible, how can I change the codes to be able to put new commands for other types of questions in the future?